If your Servo is seized (Knob on shaft will not turn) then this indicates water has penetrated the sealed motor and rust has formed. Depending on how much corrosion is present, you may be able to remove the Servo and clean it with a wire brush and WD-40. See Video.

Note: The Servo motors are designed to run 24/7 for many years. We typically only see failures on certain V Drive Boat models that have excessive bilge water splashing up on the drive belts during acceleration which results in water spraying on the Servo. Water can also find its way through the engine hatch seams on some models.

Do NOT use a wrench to try to turn the knob or shaft if seized, this may result in more damage.